98 lines
2.0 KiB
C++
98 lines
2.0 KiB
C++
/**
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* \brief Dynamic linker interface
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* \author Sebastian Sumpf
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* \date 2014-10-09
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*/
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#ifndef _INCLUDE__BASE__SHARED_OBJECT_H_
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#define _INCLUDE__BASE__SHARED_OBJECT_H_
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#include <base/exception.h>
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#include <base/stdint.h>
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namespace Genode {
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class Shared_object;
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struct Address_info;
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};
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class Genode::Shared_object
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{
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private:
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void *_handle = nullptr;
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void *_lookup(const char *symbol) const;
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public:
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class Invalid_file : public Genode::Exception { };
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class Invalid_symbol : public Genode::Exception { };
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enum open_flags {
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NOW = 0x1,
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LAZY = 0x2,
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KEEP = 0x4, /* do not unload on destruction */
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};
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/**
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* Load shared object and dependencies
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*
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* \param file Shared object to load
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* \param flags LAZY for lazy function binding, NOW for immediate binding
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*
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* \throw Invalid_file
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*/
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Shared_object(char const *file = nullptr, unsigned flags = LAZY);
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/**
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* Close and unload shared object
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*/
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~Shared_object();
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/**
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* Lookup a symbol in shared object and it's dependencies
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*
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* \param symbol Symbol name
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*
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* \throw Invalid_symbol
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*
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* \return Symbol address
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*/
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template<typename T = void *> T lookup(const char *symbol) const
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{
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return static_cast<T>(_lookup(symbol));
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}
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/**
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* Link information
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*/
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struct Link_map
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{
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Genode::addr_t addr; /* load address */
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char const *path; /* object path */
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void const *dynamic; /* pointer to DYNAMIC section */
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Link_map *next;
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Link_map *prev;
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};
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/**
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* Return link map of shared object
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*/
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Link_map const * link_map() const;
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};
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struct Genode::Address_info
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{
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char const *path; /* path of shared object */
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Genode::addr_t base; /* base of shared object */
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char const *name; /* name of symbol */
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Genode::addr_t addr; /* address of symbol */
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class Invalid_address : public Genode::Exception { };
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Address_info(Genode::addr_t addr);
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};
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#endif /* _INCLUDE__BASE__SHARED_OBJECT_H_ */
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